1898.] NATURAL SCIENCES OF PHILADELPHIA. 295 



nial flax was first noticed by the expedition on the Missouri above 

 the Great Falls " for several days" before July 19, 1805, below, at 

 and above Dearborn's River, in the vicinity, not close, of Helena, 

 Montana. The species then described was identified as L. perenne 

 by Mr. F. H. Knowlton, p. 423 of my edition of the work. Some 

 of the country traversed in July, 1805, distinctly includes "valleys 

 of the Rocky Mountains," and I suspect that " 1806 " should read 

 1805 ; also, that July " 9 " and " 19 " are merely scribal duplication 

 of a single date. 



Claytonia lanceolata Pursh, Fl. 175, t. 3. 



June 27, 1806. "Headwaters of the Kooskooskee" is quite 

 right. L. & C. were on the Lo Lo or Northern Nez Perce Trail, 

 along the divide between sources of both N. and S. forks of that 

 river, in central Idaho. It is the same day on which they notice 

 Erythronium grandiflorum. 



Claytonia perfoliata Don. (In Mr. Meehan's footnote, p. 19.) 



March 26, 1806. On the lower Columbia, above Puget's Island 

 and below the Cowlitz River. 



April 17, 1806. " Rocky Camp," i. e., The Dalles, as above ex- 

 plained. 



Claytonia sibirica L. (In Mr. Meehan's footnote, p. 19.) 



Aprils, 1806. In camp on the Columbia, in Multnomah Co., 

 Oregon, about 10 miles above Quicksand or Sandy River; vicinity 

 of the place called Cape Horn. 



Claytonia linearis Dougl. (In Mr. Meehan's footnote, p. 20.) 



June 27, 1806. As above said for C. lanceolata. 

 Lewisia triphylla Rob. 



June 27, 1806. Same as the last. 

 Lewisia rediviva Pursh, Fl. 368. 



July 1, 1806. At mouth of Traveller's Rest Creek of L. & C, 

 %. e., of the Lou Lou Fork of the Bitter-root River, some 12 miles 

 south of Missoula, Montana. It should be explained " Clark's 

 River," the assigned location of this plant and some others, always 

 means Bitter-root River, in so far as any plants collected are con- 

 cerned. Lewis named Clark's River September 6, 1805, when the 

 expedition was in Ross' Hole near the head of the east fork of the 

 Bitter-root River ; the party went down this river only as far as the 

 Lou Lou Fork just said, up which they turned sharp and so on over 



